TDK-Lambda France
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Est-ce que je peux alimenter une alimentation AC-DC à partir d’une source DC?
...The answer is yes, sometimes. But the unit's safety certification may only apply to AC input.
Many standard AC-DC switched mode power supplies (most of TDK-Lambda’s products) will operate from voltage DC input range in addition to the more common AC input range of 90-264VAC.
However we strongly recommend users to contact their supplier for guidance on safe installation.